Dolby Digital in SVCD

[apakhira]

Hi
I want to insert a Dolby Digital AC3 file in an SVCD.How do i do it?

[fossil]

well you can mux it with bbmpeg or tmgenc i think. well it wont play on your stand alone dvd that's the problem

[apakhira]

Well will i mux a Dolby Digital AC3 file or a DD Wave file into the video?

[Cornucopia]

A DD-Wave file is just a DD (aka AC3) file that has been sector buffered and header-wrapped with the usual WAVE RIFF headers. To all external programs that don't explicitly support this format, it looks like a standard PCM wave file. It would just play "whitenoise/garbage" if you tried to play it.

So your question goes back to something more like:
"Which one should I do-mux video with AC3 or WAV/PCM?"
This is an easier answer... You CANNOT mux a wave file with MPEG video into a standard program stream (or system stream, or transport stream). The only MPEG stream that supports WAV/PCM audio is a DVD VOB. And the only way to mux together into a DVD VOB is to AUTHOR a DVD.

Now, MPEG2 Program streams will support Mpg1Layer1, Layer2, Layer3 (aka MP3), Mpg2Layer2.5, and AC3 stream types. But that doesn't mean that hardware players will support the playback of all these types.
I ought to know, I had this very same question about 6-9 months ago and did some trials. Yes, you can mux it (some are very difficult to do though), but rarely will anything non-standard play. At all.

IIWY, I'd stick with converting DVD's or DivX's AC3 2ch to Mp2; and AC3 5.1ch to Mp2.5 (aka Mpeg2 5.1ch audio) for use on SVCD, and using only the 2ch Mp2 on VCD. You can still do a downmix to Dolby Surround-matrixed 2ch and get some of the features of the original.

HTH,
Scott

[apakhira]

so how do i convert an ac3 file into an mp2.5 file? (by what app?)
And if i want to use the AC3 file directly, i'd use the normal AC3 file, not the DDwave file, u say?

[Gazorgan]

BeSweet can convert AC5.1 down to MP2 Dolby Surround (which is 4 channel Audio muxed into 2). Dolby surround isnt' 5.1, but it's much better than straight stereo (rear speakers do that).

[Cornucopia]

Hypercube

Only way to go.

[apakhira]

Gazoran,
will i use the mp2 option of BeSweet to convert to Dolby Surround?And Cornucopia, would u pls put a link of Hypercube?

[Cornucopia]

You can read about the development of the Hypercube transcoder from past threads on this site, or go to http://hypercube.is.dreaming.org/.

HTH,
Scott